Typewriting machine



O 1 U Feb 1927 5. 3. some TYPEWRITING MACHINE 16, 1924 z Sheets-Sheet 1Filed April INVENTOR ATTORNEY Feb. 1, 1927. 1,615,835

G. G. GOING TYPEWRITING MACHINE Filed April 16, 1924 2 Sheets-Sheet 2 I.INVENTOR x ATTORNEY Patented Feb. 1, 1927.

UNITED STATES, PATENT OFFICE,

GEORGE GOULD GOING, OF MIDDLETOWN,

CONNECTICUT, ASSIGNOR TO REMINGTON- NOISELESS TYPEWRITER CORPORATION, OFNEW YORK. N. Y., A CORPORATION OF NEW YORK.

TY PEWRITING MACHINE.

Application filed April 16, 1924. Serial No. 708,844.

This invention relates to typewriting machines, and more particularly tofront stroke machines in which pivoted type bars are employed; I

The object, generally stated, of this 1nvention is to provide a simpleand improved construction for type bars and their actuating connectionswhich is functionally and structurally eflicient, and may be economcally manufactured.

Another and more specific object of thls invention is to provide atypewriting machine, in which the type bars, particularly pivoted typebars, are prevented from printing through impact by means of a stop, andto provide improved means for causing the type bars to print by pressureafter having been arrested by said stop, -whereby the printingope-ration is accomplished substantially without noise.

To the above and other ends which will hereinafter appear my inventionconsists in the features of construction, combinations of elements, andarrangements of parts set forth in the following description andparticularly pointed out in the-appended claims.

For a fuller understanding of the nature and objects of the inventionreference should be had to the following detailed description taken inconnection with the accompanying drawing, in which:

Figure 1 is a view, mainly diagrammatic, and in side elevation, showingpart of a front stroke typewriting machine provided with a type actionand associated parts constructed in accordance with this invention;

the view illustrating the parts in normal position, and

Figure 2 is a view slmilar to Fig. 1 but showing theparts disposed asthey appear when the type bar is in. printing position.

Referring now to the drawings, 10 denotes the franre of the typewritingmachine having a key lever 11 pivoted at 12 adjacent the rear portion ofthe frame and provided with a printing key 11*; The key lever, asindicated, is suitably connected, as by a pin and slot connection 12,13*, with a sub-lever 13 which is pivoted at 14: and is dlrectlyconnected to actuate the associated type bar,

shown generally at 415. The type bar is mounted to turn on afixed-pivot'16 to the printing position, and when in retracted positionrests upon the support 17. When swung from the normal, or retracted,position to the printing position, as shown more clearly in Fig. 2, thetype bar strikes against the stop 18 which, as shown, is faced with asoft pad orcushion- 19 in order the better to absorb both the noise andthe momentum of the type bar when it comes in contact with the stop.This stop is so positioned and constructed that the type bar may beswung around its pivot 16 by the parts thus far described from itsretracted position to a position which approaches contact with theplaten- 20 very closely, the clearance from the platen afforded by thestop being in the neighborhoodof, say, a hundredth of an inch or so. Thestop, therefore, will prevent the type on the bar thus actuated fromreaching the platen or the paper thereon, and prevent an impact orhammer blow.

It will, of course,be understood that while but one type action at thecenter of the system has been disclosed, this has been done in theinterest of clearness. Such disclosure accordingly should be taken asindicative of the plurality of such type actions except for the slightstructural changes required for the side actions. Thus it will beunderstood that upright arms 13 of the sub-levers at the sides of thesystem are inclined inwardly in the usual manner to compensate for thedifference in width between thesystem of key levers and the system oftype bars.

In order to effect pressure printing as distinguished from an impact orhammer blow, there is disposed beneath the key levers the transverse bar21, which is swung from a pair of hangers 22 pivoted, as indicated at23, to the frame of the machine. The bar 21 may be constructed, desired,to function as the so-called ordinary universal bar which functions toactuate the spacing mechanism (not shown), or as wholly independentthereof, as the case may be. The hangers .22, when they swing, eachpreferably acts to 1 compress a returning spring 25, disposed between itand a fixed part of the machine, shown at 24. The bar 21 is actuated byeach key lever 11, and is provided with an upwardly extending centrallydisposed connecting rod. 26, which v is pivotally connected at 27 to acentrally located oscillating lever 28. This oscillating lever asindicatedis pivoted at '29 to. the upper front portion of the frame 10and preferably carries an anti-friction roller 30 at its free end. Thisoscillating levenoperates in common with each type bar, and itsoperation is so proportioned and timed that when a type bar has justswung into contact with the padded face of the stop 18, the roller 30has just been pulled down sufficiently behind such type bar to engagewith V the rear surface 31 of the free end portion thereof. N Thissurface 31 is preferably hardened and arranged to serve as an inclinedfaceor cam along which the thrust force of the downwardly movingoscillating lever 28 is applied through the contact of the antifr-ictionroller 30 on it. The effect of the force thus applied to each type barby the lever 28 is to press the registering type face against the paper,the actuated type bar at this time compressing the cushion 19sufficiently to enable the imprint to be noiselessly effected. v

The connecting of each sub-lever 13 With the associated type bar isshown, in the present instance, as accomplished by means of a pin 32 inthe upper end of the sublever which engages with an elongated slot 33 inthe heel 3 1 of the type bar.

, To aid in returning the parts of each type action to normal position,an expansion spring 35 is arranged under each key lever adjacent to -itsrear end and bears at its lower end against a fixed part '36 of theframe of the machine. stop 37 is also provided to arrest the return'movement of the key levers. 1

The operation of the construction describd'is as follows: When a key11Fisfdepressed from the position, shown in Fig. 1 'to the full lineposition shown in Fig. 2, this movement causes the upper end of theassociated sub-level 13 to move forwardly, imparting a downward pull onthe heel 34 of the connected type bar 15. This type bar, in consequence,swings through an arc toward printing position which is shownrindownward movement of the key lever wedges the anti-friction roller 30further along the cam edge 31 to force the type bar against and compressthe pad19 and effect a pressureim rint on the paper against theresistance of t e pad 19.

4 When the finger of the operator is're- A fixed padded cushion st'opfixediiy moved from the key the parts are adapted of the arrested typebar is separated from the platen surface by a relatively small distance. Thelkey" lever however is arranged to operate the independentmeans 21, 26 and 28,*\vhich in the construction shown would be common toall the type bars, such means being arranged to apply a relatively greatforce behind the head of the type bar just after it has come to restagainst the stop.

Force thus applied causes the yielding of the pad .19,'so that the typebar is forced through the relatively short distance remaining intocontact with the platen surface or the paper thereon so that printing iseffected under the influence of pressure in a substantiallynoiselessmanner. The kinetic energy ofthe moving parts is thussubstantially absorbed by the stop, the energy for actual printing beingsupplied as pressure through the co-acting but independent mechanicalmeans here provided.

Various changes may be made without departing, from my invention as itis defined in the accompanying claims.

Having described my invention, what I claim as new and desire to secureby Letters Patent, is:

1. In a front stroke type-writing machine having a platen,-thecombination with a type action comprising a key lever, a type barmounted to turn on a fixed pivotal center and to effectanimprinta'gainst'the front face of the platen, and actuating connections betweenth'e'key. lever and type bar, of a maintained at all times inv the pathoflsai printing position and arranged substantially to noisel'esslyarrest the same at a relatively short distance from said platen, and apivoted lever separate and distinct from said stop and normally outofthe path of the type bar in the printing movement of the latter type.bar as it swings to but arranged to oscillate behind said type bar andcoact therewith and provided with independent actuatln connections tosaid key lever, said pivoted lever being arranged to engage with saidtype bar when the latter is substantially arrested by said fixed cushionstop and apply pressure to the bar' to' complete the printing strokearound the fixed pivotal center of the type bar. 7 2a In a typewri tingmachine having a platen, the combination with a type. action comprisinga key lever, a type bar mounted 75 i stop 18-19, so that the registeringtype face said platen, and an oscillating lever pivoted to a fixedp'artof said machine and having independent actuating connections tosaid key lever and arranged to'swing in behind said type bar when thelatter is substantially arrested and to engagetherewith and press it byawedging actionagainst the printing surface of the platen and against theresistance of said padded stop.

3. In a typewriting machine having a platen, the combination with a typeaction comprising a key lever, a type bar mounted to turn on a fixedpivotal center and actuating connections between said key lever and typebar, of a padded stop fixed in the path of said type bar as it swings toprinting position and, arranged substantially to arrest the same at arelativelyshort distance from said platen, and an oscillating leverpivoted to a fixed part of said machine behind the type bar when thelatter is in printing posit-ion, said lever having independent actuatingconnections to said key lever and provided with an anti-friction rollerat its free end and'arranged to engage withithe typebar when the latteris substantially arrested, said type bar-having an engaging surfaceformedat its rear edge and adapted to receive a continued movementaround its fixed pivotal center from said oscillating lever when thelatter engages the type bar and thereby effect a pressure imprintagainst the platen surface or the paper thereon while the typebar ispressed against the resistance of said padded stop.

4. In a front stroke typewriting machine having a platen, thecombination with a series of type actions each comprising a key lever, atype bar mounted to turn on a fixed pivotal center in its movement fromnormal to printingiposition, and individual actuating connectionsbetween each key lever and, the associated type bar, of a yieldingstopfixed in the path of the type bars and arranged substantially toarrest the swinging movement thereof at a relatively short distance fromsaid platen, and a pressure 'applying lever actuated by all of said keylevers and arrah-gedito engage any of the actuated type bars and toapply a cammmg pressure thereto substantially immediately after suchtype bar has been arrested and effect a pressure "imprint by pressingsaid type bar beyond the point where it is initially arrested by saidstop in its swinging movement.

'5. In a typewriting machine having a and actuating connectionstherebetween, of a stop fixed in the path of and arranged to arrest.said type bar at a relatively short distance from said platen, and apivoted member having an independent actuating connection with said keylever and arranged to swlng across the path of swing of said type bar asthe latter swings toward printmg position and to engage therewithsubstantially immediately after the type bar has been arrested and pressthe type bar against the resistance of said stop and beyond. the pointwhere the type bar was initially arrested by the stop and thus effect apressure imprint.

6. In a typewriting machine having a platen, the combination with a t peaction comprising a key lever, a pivoted type bar and actuatingconnections therebetween, of a fixed stop arranged substantially toarrest said type bar at a relatively short distance from said platen,andan oscillating leverhaving an independent actuating connection. withsaid key lever, said lever being pivotally attached to a fixed part ofthe machine and having its free end arranged to swing across the path ofswing of saidtype bar and to engage therewith as thetype bar swings toprinting position, said oscillating lever and actuating connection beingproportioned to engage wlth said type bar substantially immediatelyafter the type bar has come in contact withsaid stop and press the typebar to printing position agamstthe resistance of said stop.

t. In a typewriting machine having a platen, the combination with a typeaction comprising a key lever, a pivoted type bar and actuatingconnections therebetween, of a fixed stop arranged substantially toarrest said type bar at a relatively short distance from said platen,and an independent ly actuated means arranged to engage with said typebar substantially immediately after it has come into contact with saidstop, whereby pressure is applied to said type bar to cause it to effecta pressure imprint against the platen andin opposition to the resistanceof said fixed stop.

8. In a typewriting machine having a platen, the combination with a typeaction comprising a key lever, a pivoted type bar and actuatingconnections therebetween, of a stop arranged substantially to arrestsaid type bar at a relatively short distance from said platen, and anoscillating lever pivotal; ly attached to a fixed part of the machinehaving an independent actu'atingconnection with said key lever, the freeend of said oscillating lever being arranged to swing l across the pathof said type bar and engage at the rear of the printing face of saidtype bar, the engaging portion of said type bar being formed asi-aninclined plane whereby the engagement results in applying a 'con- 1tinued movement of the type bar against the resistance of said stop andcausing said type bar to effectpressure imprint against the platen.

9. In a front stroke typewriting machine,

the combination with a platen, a pivoted type bar, a key lever connectedto operate the same through an intervening bell crank,

a yielding stop for the type bar, -a lever arranged in front of andopposite the platen for pressing the type bar against the platen, and 'aconnection from said pressing lever to said key lever. 7

In testimony whereof I aflix my signature.

GEORGE GOULD GOING.

